Can I Install a Fuse Instead of Wiring a Trailer Breakaway Kit Directly to the Battery?
Updated 11/12/2025 | Published 11/05/2025
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Question:
Should a fuse be installed on the emergency break away emergency braking system, in lieu of direct wiring to the battery?
asked by: Ken B
Expert Reply:
Hey Ken. You'll want to use a 20 amp circuit breaker like item # 9506P when installing an emergency Trailer Breakaway Kit like item # 3802346. You do not want to use a fuse. Your vehicle's brake controller should already have one installed.
I have attached a wiring diagram below that will show you exactly how to install the Trailer Breakaway Kit w/ Charger item # 3802346.
What kind of trailer do you have?
(click to enlarge)
Product Page this Question was Asked From
Bright Way Trailer Breakaway Kit with Charger, LED Tester, and 5 Ah Battery - Side Load
- Trailer Breakaway Kit
- Kit with Charger
- Side Load
- Single-Axle
- Tandem-Axle
- Push-to-Test
- Electric
- Battery Included
- 5 Ah
- 48 Inch Long
- Bright Way
more information >
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on Trailer Breakaway Kit
Ken B.
11/10/2025
Thanks for the reply. My trailer is home made. I understand that the tow vehicle fuses and circuit breakers, will protect the wiring for everything connected to the tow vehicle, which is what I believe the wiring schematic shows. The wiring I was questioning was the hot wire from the breakaway battery to the breakaway switch and ultimately the electric brakes. I see the wiring schematic shows a small box where the blue and black hot wires connect. Not sure if this is just noting a connection or if that is a fuse, regardless, that is where I installed a 20Amp fuse, since there is no protection on that hot line to the brakes.